What is the test for making a claim of ineffective assistance of counsel in a habeas corpus petition?

Alamillo also must show how any alleged deficient performance of counsel would change the result. (Strickland v. Washington (1984) 466 U.S. 668, 689.) He has not made such a showing. Alamillo filed a prior habeas corpus petition raising claims of ineffective assistance of counsel in this case. On July 17, 2015, the superior court denied the petition. It ruled he failed to make a "prima facie" showing of either deficient performance of counsel or prejudice. Alamillo has made no showing that the trial court erred in its ruling on that petition.